Warp stop-motion for looms



(No Model) W. F. DRAPER. WARP STOP MOTION FOR LOOMS.

N0.582,9 04. Patented May 18, 1897.

NITE STATS WILLIAM F. DRAFER, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER CQMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP ST OP-IVIOTION FOR LOOIVIS.

SPECIFICATION forming part of Letters Patent No. 582,904, dated May 18, 1897.

Application filed January 30, 1897. Serial No. 621,272. (No model.)

To all whom it may concern: harness or heddle frames to move between Be it known that 1, WILLIAM F. DRAPER, them, the center bar I) acting as a separator of Hopedale, county of Worcester, State of for the lower ends of the two series of warp 5 Massachusetts, have invented an Improvestop-motion-actuating detectors-d. (Herein 5 ment in Warp Stop-Motions for Looms, of shown as heddles.) The bars I) I) also serve which the following description, in connecas supports for the warp-threads when in the tion with the accompanying drawings, is a lower plane of the shed. specification, like letters on the drawings rep- The heddle or detector frames (herein 6o resenting like parts. shown as two in number) are each composed,

This invention relates to that class of warp essentially, of a bottom bar a, top bar a, rig- 4 stop-motion mechanism for looms wherein a idly connected by side bars (1 each frame series of stop-motion-actuating detectors actbeing provided with upper and lower crossing merely as such or also serving as heddles bars 0, extended through slots 61 at or near 6 are utilized to effect the stoppage of the loom the upper and lower ends of the detector-hed- [5 upon breakage or undue slackness of a warpdles, substantially as shown in United States thread. 1 Patent No. 536,969, dated April 2, 1895, to

A number of patents have been granted for which reference may be had, the heddles havwarp stop-motions of this general character, ing a movement vertically independent of the :J" in the majority of which a detector in abnorvertical movement of the frame by reason 20 mal position due to failure of its warp-thread of the fact that the slots d are longer than is engaged by a vibrator, so actuated that it the width of the cross-bars 0. will not operate properly should the harness Suitable straps a a connect the upper bars mechanism of the loom be improperly set. a of the frames with pulleys a on a rotatable In this invention I have provided for some shaft a mounted in the uprights A while 2 5 variation in the set of the harness mechanthe lower bars a of the heddle-frames are conism as regards the action of the vibrator, nected by suitable straps a c with the lovers which practically insures the proper engage- 12 I7 (partly shown in Fig. l in dotted lines,) ment of the latter with a detector in abnorand actuated in usual manner by cams (L14 64 mal operative position. on the cam-shaft A all as in said patent re- 30 Figure 1 is a longitudinal section of a suffiferred to.

cient portion of a loom to be understood with A horizontal plate m is extended across the one form of my present invention embodied loom-frame below the paths of movement of therein, the lay and other mechanism having the heddles and cut out at m Fig. 2, to per- 8 no direct connection with this invention be-- mit the passage of the side bars a of the hed- 3 5 ing omitted. Fig. 2isapartial horizontal secdie-frames, said plate forming a support for tional view taken on the line a on, Fig. 1, looka vibrator, (shown as a flat base 07., upturned ing down. Fig. 3 is a detail in side elevation at its rear side at n and having secured to of a modified form of vibrator; and Fig. 4 is the upturned portion a cap n preferably a horizontal sectional View through the guide notched or corrugated on its front edge, as

0 and separator bars, looking down. at a Fig. 2.)

The loom-frame A, cross or cam shaft A The base n of the vibrator rests and slides the shipper-lever A, and the usual notched upon the support m, being normally reciproplate to hold it in place while the loom is runcated backward and forward beneath the ning properly are and may be all as common paths of the detector-heddles d, the cap 01 be- 5 in looms, the shipperz-lever operating a belting adapted to engage a detector in abnormal shipper (not shown) to control the usual drivposition due to breakage or failure of its i -b lt. warp-thread, a detector-hcddle d Fig. 1, be-

The uprights A one at each side of the ing shown in abnormal position due to breakloom-frame, support, as herein shown, plates age of its warp-thread w.

50 or bars Z) U19 arranged in parallelism trans- Referring to Fig. 1 it will be seen that the versely to and below the warp-threads w, the dropped detector rests on the base at of the barsbeing sufficientlyseparated topermit the vibrator, and accordingly the detector has not dropped as far as the cross-bars a would have permitted under ordinary conditions.

The distance the detector drops upon failure of its warp-thread is not, therefore, now governed by the position of the detector-frame so much as by the vibrator, and therefore some variation in the set of the mechanism for reciprocating the harness or heddle frames is permissible without throwing out of proper operation the vibrator.

The lower ends of the guide and separator bars I) and Z) are provided with plates b b preferably serrated or notched at their edges adjacent the heddles (see Fig. l) to prevent twisting of the latter when engaged by the cap of the vibrator.

The vibrator is providedat each end with a stud a, only one of such studs being shown in Fig. 2, to enter a longitudinal slot 0 in a rocker-arm 0, fast on a rock-shaft f, so that when the latter is rocked the vibrator will be moved first in one and then in the other direction.

Referring to Fig. 2 it will be seen that the base a of the vibrator is transversely slotted at n to receive the side bars a of the reciprocating frames.

Any suitable mechanism may be employed to rock the shaft f, and I have herein shown mechanism substantially the same as that shown in Patent No. 506,960, referred to.

The rock-shaft has fast upon ita controllerlever g, having a toe g, a heel g extended inwardly from one side thereof, and a pin or projection 9 while a spring g", operably connected to one arm of the controller-lever, acts normally to keep the toe g of the latter in contact with the cam G, fast on the shaft A This cam is provided at one side with pins or projections h, which, in the rotation of the cam, are adapted, when the loom is working properly, to pass under the elevated end of the connecting-rod h, attached to the shipper-lever A, said red at such time resting upon the heel and between it and the pin g". \Vhen, however, a detector, as (Z moves into the position shown in Fig. 1, it will be engaged by the cap a of the vibrator, stopping the movement of the latter and of the controller-lever, retaining the latter in the position shown in Fig. 1. In such position of the controller-lever the end of the rod 7t will be in the path of movement of one of the projections it, so that in the further movement of the cam said projection will act on the rod to disengage the shipper-lever from the notch in the usual holding-plate to operate in usual manner the belt-shipper or other equivalent device to move the belt from the fast onto the loose pulley, thus stopping the loom.

Obviously any other mechanism can be employed for moving the vibrator which will normally reciprocate the latter back and forth in the direction of the length of the warp and which will permit stoppage of the vibrator by engagement with a dropped detector.

The vibrator shown in Figs. 1 and 2 has such amplitude of movement that a single cap or disengaging portion 01 will cooperate with a dropped detector of either series.

In Fig. 3 I have shown a vibrator adapted for use with more than two harnesses or detector-frames, the base t having a series of longitudinally-up turned flanges '6, preferably beveled at their upper ends and having mounted thereon cap or detector engaging bars t These latter are inclined relatively to the base of the vibrator to assist a detector in dropping into place should it fall upon one of the caps. In either case the throw of the vibrator is independent of the set of the harness-actuating cams, and owing to the peculiar construction of the vibrator said harnessactuating cams may be varied as to their set within reasonable limits without causing improper operation of the vibrator.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a loom, a series of warp-stop-motionactuating detectors, a vibrator movable back and forth below said detectors in the direction of the length of the warp-threads, to engage and be stopped by a detector in abnormal position, the vibrator having a projecting portion to support and restrict the full downward movement of such detector, and means to normally move the vibrator, substantially as described.

2. In a loom, a series of warp-stop-motionactuating detectors, a vibrator movable back and forth in a substantially horizontal plane below said detectors and having an extended, flat base, a longitudinal cap on the vibrator to engage a dropped detector resting on the base, and means to normally move the vibrator, substantially as described.

In a loom, a series of warp-stop-motionaetuatin g detectors acting as heddles, means to reciprocate them vertically, a fixed guide for the lower ends of said detectors, a vibrator having a cap to engage the edge of and be stopped by a dropped detector, the base of the vibrator being extended in front of said cap below the guide, to support a detector when engaged by the cap, and means to normally move the vibrator back and forth in the direction of the length of the warp, substantially as described.

4. In a loom, a series of warp-stop-motionactuating detectors, means, including a cam, to reciprocate them vertically, a vibrator having a shelf-like base to support, and a cap to engage theedge of a dropped detector, the base restricting the downward movement thereof, means, including a cam, to normally move the vibrator back and forth below the detectors, and a shaft upon which the cams are secured, substantially as described.

5. In a loom, a frame having a cross-bar and a series of warp-stop-motion-actuating detectors supported thereby, and having a vertical movement independent of the frame, means to vertically reciprocate said frame, a

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vibrator independent of the frame and adapt- .ed to be reciprocated in the direction of the length of the warp-threads, to engage and be stopped by the edge of a detector in abnormal position, the base of the vibrator preventing the full downward movement thereof, whereby the reciprocating means may be varied as to its movement, and means to normally move the vibrator back and forth below the detectors, substantially as described.

6. In a loom, a plurality of series of warpstop-motion-actuating detectors, means to move them vertically, a vibrator having an extended base below said detectors and to support a dropped detector, a plurality of caps on said base, each cooperating with the detee-tors of one series, and means to normally move the vibrator back and forth below the detectors, substantially as described.

' 7. In a loom, a plurality of series of warpstop-motion-actuating detectors, means to move them vertically, a vibrator having an extended base below said detectors and to support a dropped detector, a plurality of caps on said base, each cooperating with the detectors of one series, said caps having their WILLIAM F. DRAPER.

Witnesses:

GEO. OTIs DRAPER, WM. W. KNIGHT. 

